Route selection method for wireless sensor network facing to target tracking application

Abstract

The invention relates to a target tracking application-oriented wireless sensor network routing method. The method comprises the following steps: adopting a forwarding strategy which combines greedy forwarding based on a target active area with bounded flooding if the data packet to be forwarded is a query data packet from a sink node to a target area; and adopting the forwarding strategy which combines the greedy forwarding based on a sink node position with supply energy of the node if the data packet to be forwarded is an aggregate data packet from the target area to the sink node. In the method, the node just needs to maintain self state information, which causes the method to be capable of better adapting to situations when the number of the nodes increases; the greedy forwarding strategy based on geographic information is adopted to reduce delay time of the data packet routing by reducing communication hops; and when the aggregate data packet is forwarded, a generalized function of the energy and distance of the nodes is taken as a forwarding cost to cause the aggregate data packet to be forwarded to a target node as soon as possible and balance energy consumption of all nodes, thus prolonging the service life of the network.

Description

technical field [0001] The invention belongs to the field of wireless self-organizing networks, in particular to a wireless sensor network routing selection method based on geographical information and oriented to target tracking applications. Background technique [0002] WSN is a network formed by a large number of autonomous micro-sensor nodes in Ad-Hoc and other ways, and can cooperatively perceive certain physical phenomena. Because the network does not require a fixed infrastructure, it can be quickly deployed, concealed, self-organized and robust, and has important application potential and prospects in many occasions such as military, industry, transportation, security, medical care and home. It is one of the hot technologies researched by industry and academia at home and abroad. [0003] The power energy carried by nodes in WSN is limited; the communication, computing and storage capabilities of a single node are weak; the topology of the network changes dynamical...

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Problems solved by technology

[0012] The purpose of the present invention is to propose a wireless sensor network (wireless sensor network) oriented to target tracking applications in view of the fact that the existing WSN routing protocols cannot meet the performance requirements of target tracking applications in terms of energy efficiency, reliability, real-time performance and scalability. network, WSN) routing method

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